000 AXPZ20 KNHC 120338 TWDEP TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 0405 UTC WED SEP 12 2007 TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM THE EQUATOR TO 32N...EAST OF 140W. BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0345 UTC. ...TROPICAL WAVES... TROPICAL WAVE ALONG 101W N OF 6N IS MOVING W 10-15 KT. LAST VISIBLE SATELLITE IMAGERY SHOWEDLOW LEVEL CLOUD LINES CONVERGING INTO A FOCAL POINT ON THE WAVE NEAR 9N101W WHERE SCATTERED MODERATE CONVECTION IS WITHIN 180 NM E OF THE WAVE FROM 11N-13N...AND IS MAINLY ASSOCIATED WITH A SMALL CYCLONIC SWIRL E OF THE WAVE NEAR 12N100W. A 1010 MB LOW MOVING W 5-10 KT IS NEAR 14N116W. THE LOW APPEARS TO BE MOSLTY IDENTIFIED AT MID-LEVELS..BUT APPEARS TO BE MOSTLY AT MID-LEVELS. THE LOW STILL HAS SOME CONNECTION TO THE ITCZ. CONVECTION HAS CONSIDERABLY DIMINISHED DURING THE PAST FEW HOURS. ONLY WIDELY SCATTERED MODERATE CONVECTION IS SEEN WITHIN 30-60 NM OF THE LOW. TROPICAL WAVE ALONG 131W FROM 6N-17N IS MOVING W 10-15 KT. CONVECTION ASSOCIATED WITH THIS WAVE IS OCCURING TO ITS W WITHIN 180 NM S OF THE ITCZ BETWEEN THE WAVE AND 133W. ...ITCZ... ITCZ AXIS IS CENTERED ALONG ALONG 7N79W 11N90W 12N101W 15N110W 11N120W 10N140W. SCATTERED MODERATE ISOLATED STRONG WITHIN 180 NM S OF THE AXIS BETWEEN 106W AND 110W. SCATTERED MODERATE WITHIN 120 NM S OF THE AXIS BETWEEN 130W AND 134W. SCATTERED MODERATE WITHIN 60 NM EITHER SIDE OF AXIS BETWEEN ...DISCUSSION... E OF 120W... MID/UPPER LEVEL ANTICYCLONIC FLOW IS PRESENT OVER NORTHERN MEXICO WITH ASSOCIATED RIDGE AXIS EXTENDING SW TO SOUTHERN BAJA AND TO 23N115W. TO THE SE OF THE ANTICYCLONIC FLOW...THERE IS A NEARLY STATIONARY UPPER LEVEL CYCLONIC CIRCULATION OVER WESTERN MEXICO NEAR 22N104W. MODERATE TO STRONG NE FLOW IS BETWEEN CHANNEL IN BETWEEN BOTH OF THESE FEATURES...AND REACHES WESTWARD TO 112W. EXTENSIVE MID/UPPER LEVEL TROPICAL MOISTURE COVERS THE AREA TO THE E OF THE LINE 28N114W 14N120W. THE UPPER LEVEL CYCLONIC CIRCULATION IS HELPING TO ADVECT THIS TROPICAL MOISTURE ENE ACROSS CENTRAL MEXICO. THE MOISTURE THEN GETS CAUGHT UP IN THE ANTICYCLONIC FLOW...AND IS BEING USHERED WESTWARD ACROSS BAJA CALIFORNIA TOWARDS 118W AND S OF 28N. A SMALL MID/UPPER LEVEL ANTICYCLONE IS CENTERED OVER THE BAY OF CAMPECHE NEAR 20N94W. TO ITS S A WEAK INVERTED TROUGH MOVING W 10-15 KT IS ALONG 106W. THE UPPER FLOW IS NE-E TO THE E OF THE TROUGH WITH ENHANCED TO ITS E IN THE VICINITY OF THE TROPICAL WAVE ALONG 101W. AT THE SURFACE...A WEAK PRES PATTERN PERSISTS. W OF 120W... A LARGE MID/UPPER LOW IS LOCATED TO THE N OF THE AREA AND W OF CALIFORNIA NEAR 36N138W. THE CYCLONIC FLOW PATTERN EVIDENT WITH THIS FEATURE DOMINATES THE AREA N OF 27N. A MID/UPPER LEVEL TROUGH ASSOCIATED WITH THIS LOW EXTENDS SSE INTO THE REGION THROUGH 32N133W...AND THEN SSW THROUGH 25N133W TO 18N137W. A JET STREAM BRANCH ENTERS THE REGION THROUGH 27N140W AND ROUNDS THE BASE OF THE TROUGH AT 27N133W...THEN WEAKENS BEFORE EXTENDING NEWD TO OUT OF THE REGION AT 32N124W. A WEAK UPPER LEVEL CYCLONIC CIRCULATION IS NOTED ON THE TAIL END OF THE TROUGH NEAR 17N138W. WSW FLOW ALONG AND S OF THE JET STREAM MERGES WITH NWLY FLOW AROUND THE LARGE MID/UPPER LOW PRODUCING AMPLE SUBSIDENCE AND ASSOCIATED DRY AIR N OF 17N. MID/UPPER LEVEL DEEP TROPICAL MOISTURE...IN THE FORM OF SCATTERED CIRRUS CLOUDS ARE BEING USHERED FROM THE CENTRAL PACIFIC INTO THE FAR NW SECTION FROM 22N-27N W OF 135W. PATCHES OF MAINLY SCATTERED TO BROKEN STRATOCUMULUS CLOUDS WITH ISOLATED SHOWERS ARE SEEN NW OF LINE 21.5N140W TO 32N124W. AT THE SURFACE...A 1019 MB HIGH IS ANALYZED NEAR 31N127W WITH A RIDGE TO 21N132W. LIMITED MOISTURE UNDER THE SUBSIDENCE IS FOUND THROUGHOUT. $$ AGUIRRE